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Thanks a lot Jaakko and Theo, makes me very happy that my flies have names now.

May I ask, why the third flie looks so different for me? The long neck is to see on every picture and it did not get more colour after hours. It also has more hairs between the eyes.

I thought that No. 1 is a male one and the others both are female. Is this correct?

Sorry to disturb you with so many questions, but I like to understand all what I've seen.